Determine which of the following reactions taking place at constant pressure represents system that

Question

Determine which of the following reactions taking place at constant pressure represents system that do work on the surrounding environment \I. $\mathrm{Ag}^{+}(a q)+\mathrm{Cl}^{-}(a q) \longrightarrow \mathrm{AgCl}(s)$ \II. $\mathrm{NH}_4 \mathrm{Cl}(\mathrm{s}) \longrightarrow \mathrm{NH}_3(\mathrm{~g})+\mathrm{HCl}(\mathrm{g})$ \III. $2 \mathrm{NH}_3(g) \longrightarrow \mathrm{N}_2(g)+3 \mathrm{H}_2(g)$

Professor PC Thomas Classes · Answer

(c) $W=-\Delta n_g R T=-\mathrm{ve}$ 
II. $\Delta n_g=2$, 
III. $\Delta n_g=2$